$OpenBSD: patch-src_rrd_cgi_c,v 1.3 2017/03/18 23:06:58 sthen Exp $

https://github.com/oetiker/rrdtool-1.x/issues/774

--- src/rrd_cgi.c.orig	Tue Apr 19 16:52:25 2016
+++ src/rrd_cgi.c	Sat Mar 18 23:00:39 2017
@@ -1143,7 +1143,7 @@ char     *scanargs(
         }
 
         /* check if our argument array is still large enough */
-        if (argc == argsz) {
+        if (argc >= argsz - 2) {
             /* resize argument array */
             argsz *= 2;
             argv = (char **) rrd_realloc(argv, argsz * sizeof(char *));
